Abstract: A simple, fast method for manufacturing a fuel cell separator with integrated elastomer seal has been developed using a UV-curable elastomer composition for the seal. A mold for the seal comprising a flexible sheet made of PTFE or polystyrene is employed. The mold is compressed against a separator plate between a support and a UV-transparent clamping block. Elastomer is then appropriately injected and cured using UV light. Thereafter, the flexible sheet is peeled off, rather than removed all at once, thereby avoiding delamination of the fragile seal from the separator plate.

Abstract: Certain monomer composition mixtures having desirable properties for purposes of impregnating porous substrates (e.g. low viscosity, low vapor pressure, low viscosity) have also been found after curing to have surprisingly good mechanical characteristics at elevated temperature (e.g. relatively high storage modulus and flexural stress at ?90° C.). These monomer compositions comprise a blend of at least two different monomers, the first being a mono- or difunctional methacrylic or acrylic ester and the second being a polyfunctional methacrylic or acrylic ester. The total amount of monofunctional and difunctional monomers in the composition is in a weight range from about 20 to about 90% and the total amount of polyfunctional monomers is in a weight range from about 10 to about 80%. These monomer compositions are particularly suitable for preparing robust, impregnated carbon plates for use in solid polymer electrolyte fuel cells, which typically operate around this elevated temperature.

Abstract: An electrically conductive adhesive is disclosed for bonding anode and cathode flow field plates together for use in fuel cells. The adhesive formulation comprises epoxy methacrylate resin and non-fibrous carbon particles but little to no carbon fibres. The adhesive provides suitable strength, bond gap, conductivity and other properties, particularly for flow field plates made of flexible graphite, carbon, or metal.

Abstract: An electrically conductive adhesive is disclosed for bonding anode and cathode flow field plates together for use in fuel cells. The adhesive formulation comprises epoxy methacrylate resin and non-fibrous carbon particles but little to no carbon fibres. The adhesive provides suitable strength, bond gap, conductivity and other properties, particularly for flow field plates made of flexible graphite, carbon, or metal.